JP2023051653A - Vehicle body structure - Google Patents

Abstract

To improve a degree of freedom in layout in a cabin while enhancing vehicle body rigidity.SOLUTION: A vehicle body structure A includes: a floor panel 41; a center frame 80 which is arranged to be separated upward from the floor panel 41; and an air conditioner 120. The air conditioner 120 has an air distribution section 123 which is positioned above a front section of the center frame 80 and distributes generated air-conditioned air to each section in an occupant space and foot ducts 124A, 124B which guides the air-conditioned air downward. The foot ducts 124A, 124B extend downward from the above of the center frame 80 through the outside in a vehicle width direction of the center frame 80.SELECTED DRAWING: Figure 5

Description

TECHNICAL FIELD The present disclosure relates to a vehicle body structure provided in an automobile.

For example, in the automobile disclosed in Patent Document 1, the control device is arranged inside the instrument panel below the upper surface of the instrument panel and above the accelerator pedal.

Japanese Patent Application Laid-Open No. 2021-35789

By the way, in automobiles, how to ensure the rigidity of the vehicle body is an important issue. In order to solve this problem, for example, it is conceivable to provide a reinforcing member or the like in the vehicle interior, but other parts and devices are also arranged in the vehicle interior. was difficult to raise.

The present disclosure has been made in view of such a point, and an object thereof is to improve the degree of freedom in the layout of the vehicle interior while increasing the rigidity of the vehicle body.

In order to achieve the above object, the first aspect of the present disclosure can be premised on a vehicle body structure for an automobile. The vehicle body structure includes a floor panel that constitutes the floor of an occupant space in which a seat for a occupant is provided, and a center portion of the occupant space in the vehicle width direction that is disposed above the floor panel and is spaced apart from the floor panel in the vehicle front-rear direction. An extending center frame and an air conditioner for blowing conditioned air into the passenger space are provided. The air conditioner includes an air distribution section that is positioned above the front portion of the center frame and distributes the generated conditioned air to each part of the passenger space, and guides downward the conditioned air that is blown from the air distribution section. It has a foot duct. The foot duct extends downward from above the center frame through the outside of the center frame in the vehicle width direction.

According to this configuration, by providing the center frame, which is spaced upward from the floor panel, in the passenger space, a reinforcing effect of the vehicle body can be obtained, and as a result, the rigidity of the vehicle body can be increased. In addition, since the air distribution section of the air conditioner is located above the center frame, it is not necessary to dispose the air distribution section in the space below the center frame. Furthermore, since the foot duct connected to the air distribution portion extends downward through the outside of the center frame in the vehicle width direction, there is no need to arrange the foot duct in the space below the center frame. . Therefore, various parts, devices, etc. can be arranged in the space below the center frame, and the degree of layout freedom is improved.

In the second aspect of the present disclosure, the front portion of the center frame is composed of a left frame component and a right frame component which are spaced apart from each other in the vehicle width direction. The foot duct includes a left foot duct extending downward from above the left frame component and passing through the left frame component outside in the vehicle width direction, and a left foot duct extending downward from above the right frame component. and a right foot duct extending downward through the outer side of the component in the vehicle width direction.

According to this configuration, the conditioned air can be blown to the left side and the right side of the passenger space by the left leg duct and the right leg duct, respectively, so that the comfort of the passenger can be improved. In this case, the left leg duct and the right leg duct do not need to be arranged in the space below the center frame, so the layout flexibility of the space below the center frame is not deteriorated.

A center frame according to the third aspect of the present disclosure is hollow. An air guide duct that communicates the air distribution portion of the air conditioner with the inside of the center frame and introduces conditioned air blown from the air distribution portion into the center frame, is provided between the left frame component and the right frame. It is arranged between the component members. A blowing section for blowing conditioned air inside the center frame is provided at a portion of the center frame which is spaced rearward of the vehicle from the connection portion with the air guide duct.

According to this configuration, the conditioned air generated by the air conditioner is introduced into the center frame through the air guide duct, and then blown out from the air blower. Since the center frame extends in the front-rear direction, the conditioned air can be guided to desired locations in the passenger space in the front-rear direction. In this case, since the air guide duct is arranged between the left frame component and the right frame component, the air guide duct does not have to be arranged in the space below the center frame, and the space below the center frame is not required. The layout flexibility of the space is not deteriorated.

Below the center frame according to the fourth aspect of the present disclosure, a control device that controls the controlled parts mounted on the automobile is arranged.

According to this configuration, the space below the center frame can be effectively used as a layout space for the control device. In addition, the control device may be vulnerable to heat, but in this configuration, the center frame is positioned above the control device, so the center frame blocks direct sunlight from the outside and suppresses the temperature rise of the control device. be done.

In a fifth aspect of the present disclosure, the cross section of the foot duct perpendicular to the air circulation direction has a dimension in the longitudinal direction of the vehicle that is longer than the dimension in the lateral direction of the vehicle.

According to this configuration, the foot duct has a flat cross section that is elongated in the longitudinal direction of the vehicle, so the cross-sectional area is increased while suppressing the protrusion of the foot duct in the vehicle width direction, ensuring a large amount of airflow. can.

As described above, the center frame is arranged above the floor panel, the wind distribution section of the air conditioner is provided above the center frame, and the duct for guiding the conditioned air downward is provided from above the center frame. Since it is provided so as to extend downward through the outer side of the center frame in the vehicle width direction, it is possible to improve the degree of freedom in the layout of the vehicle interior while increasing the rigidity of the vehicle body by the center frame.

1 is a side view of an automobile having a vehicle body structure according to an embodiment of the present invention; FIG. 1 is a perspective view showing a state in which an automobile is divided into an upper structure and a lower structure; FIG. It is the perspective view which looked at a part of vehicle body structure from upper direction. FIG. 2 is a vertical cross-sectional view of the central portion in the vehicle width direction showing the air conditioner and the vehicle body structure in the vicinity thereof. It is a view showing the cross-sectional shape of the center frame as seen from the front. FIG. 4 is a cross-sectional view of a bent portion of the center frame and its vicinity; FIG. 4 is a cross-sectional view of the vicinity of the front portion of the rear frame member that constitutes the center frame; It is a perspective view of a connection member. It is the perspective view which looked at the connection member from another direction. It is a side view of a connection member. It is a sectional view of an air conditioner and its vicinity. It is a top view of an air conditioner and its vicinity. 1 is a schematic diagram of a cooling path; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail based on the drawings. It should be noted that the following description of preferred embodiments is essentially merely illustrative, and is not intended to limit the invention, its applications, or its uses.

FIG. 1 is a left side view of an automobile 1 having a vehicle body structure A according to an embodiment of the present invention. In the description of this embodiment, the vehicle front-rear direction is simply referred to as the "front-rear direction," the vehicle front side is simply referred to as the "front side," and the vehicle "rear side" is simply referred to as the rear. In addition, the vehicle width direction is the left-right direction of the vehicle, and the left side of the vehicle is simply referred to as the "left side", and the right side of the vehicle is simply referred to as the "right side".

(Overall structure of automobile)
The automobile 1 is a passenger automobile, and an occupant space R1 for an occupant to ride in is provided in an intermediate portion in the front-rear direction of the automobile 1 . The passenger space R1 is provided with front seats (front seats) FS and rear seats RS. The front seat FS includes a driver's seat located on the right (or left) side of the passenger space R1 and a front passenger's seat located on the left (or right) side of the passenger space R1. Rear seats RS are also arranged on the right and left sides of the passenger space R1, respectively. Although not shown, a third row seat may be arranged behind the rear seat RS. Also, the rear seat RS is not essential and may be omitted.

A front door FD and a rear door RD are provided on the left and right sides of the passenger space R1, respectively. In the case of the automobile 1 without the rear seat RS, the rear door RD can be omitted.

A front space R2 is provided in front of the passenger space R1 of the automobile 1. - 特許庁A power train PT can be mounted in this front space R2 as required. When the power train PT is mounted in the front space R2, the front space R2 can also be called a power train storage room, a motor room, an engine room, or the like. A bonnet hood BF is provided above the front space R2.

Behind the passenger space R1 of the automobile 1, there is provided a cargo room space R3 in which luggage and the like can be accommodated. The trunk space R3 can be opened and closed by the trunk lid TR. A rear space R4 is provided behind the passenger space R1 of the automobile 1 and below the cargo room space R3. A power train PT that generates power for the automobile 1 can be mounted in the rear space R4 as required. When the power train PT is mounted in the rear space R4, the rear space R4 can also be called a power train storage room, a motor room, an engine room, or the like.

The power train PT may be mounted in both the front space R2 and the rear space R4, or may be mounted in only one of them. When the powertrain PT is installed only in the front space R2, the powertrain PT drives only the front wheels FT, and the powertrain PT is installed only in the rear space R4. It becomes a rear-wheel drive vehicle in which only the rear wheels RT are driven by the power train PT. Further, when the power train PT is mounted in both the front space R2 and the rear space R4 to drive the front wheels FT and the rear wheels RT, the vehicle becomes a four-wheel drive vehicle.

The power train PT includes at least a traveling motor M (shown in FIG. 2) for driving the drive wheels, and if necessary, a speed reducer, a transmission, and the like. Therefore, the automobile 1 is an electric vehicle. The traveling motor M is arranged such that its center of rotation extends in the left-right direction. The power train PT may include, for example, a controller and the like in addition to the traveling motor M. Powertrain PT may include an internal combustion engine. A battery unit Y (also shown in FIG. 1) for supplying electric power to the running motor M is mounted on the lower portion of the automobile 1 . For example, the power generated by the internal combustion engine may be used to charge the battery unit Y, or the power generated by the internal combustion engine may drive at least one of the front wheels FT and the rear wheels RT.

The type of automobile 1 may not be a four-door vehicle as shown in FIG. 1 as an example, but may be, for example, an automobile without rear doors RD. Moreover, although not shown, the present invention can also be applied to a vehicle such as a hatchback vehicle in which the rear space R4 can be opened and closed with a tailgate.

As shown in FIG. 2, the automobile 1 includes a lower structure 2 and an upper structure 3, and the lower structure 2 and the upper structure 3 constitute a vehicle body structure A. As shown in FIG. In FIG. 2, doors FD, RD, bonnet hood BF, fenders, window glass, roof, center pillar, rear pillar, bumpers, front and rear lighting devices, instrument panel, front and rear seats, etc., which the upper structure 3 originally has. is removed. FIG. 2 also shows a state in which the front wheels FT, the rear wheels RT, the suspension device, and the like, which are originally included in the lower structure 2, are removed.

The lower structure 2 has a battery unit Y. As shown in FIG. The battery unit Y has a front battery FB, a rear battery RB, and a frame 10 surrounding the front battery FB and the rear battery RB. The lower structure 2 also includes a front support frame 20 extending forward from the front portion of the frame 10 and a rear support frame 30 extending rearward from the rear portion of the frame 10 .

Although not shown, in the case of a general electric vehicle, the battery unit is often detachable under the floor as a separate body from the vehicle body. , and the front support frame 20 and the rear support frame 30 are integrated with the frame-shaped frame 10 surrounding the RB, and the front support frame 20 and the rear support frame 30 are detachable from the upper structure 3 together with the batteries FB and RB. It's becoming

Specifically, the automobile 1 of this embodiment is configured to be vertically divisible into a lower structure 2 having batteries FB and RB and an upper structure 3 forming a passenger space R1 and a luggage space R3. . Being vertically divisible means integrating the lower structure 2 with the upper structure 3 using fastening members such as bolts, nuts, and screws without using welding, adhesion, or the like. As a result, the lower structure 2 can be separated from the upper structure 3 as necessary when maintenance or repair is performed after the automobile 1 has been handed over to the user, thereby improving maintainability.

Here, a ladder frame type body structure is known as a body structure of an automobile. In the case of the ladder frame type car body structure, the ladder frame and the cabin can be divided vertically, but since the ladder frame extends continuously in the front-rear direction, receive the impact load. In the event of a side collision, the rudder frame only receives the impact load in a supplementary manner, and it is the cabin that primarily receives the impact load. As described above, in the ladder frame type vehicle body structure, it is common that the members that receive the collision load at the time of the frontal collision, the rear collision, and the side collision are separated.

On the other hand, in the case of the automobile 1 of this embodiment, the lower structure 2 having the front support frame 20 and the rear support frame 30 and the upper structure 3 are separable. and in both cases of a side collision, the impact load is received by the lower structure 2 and the upper structure 3, so that the impact load can be dispersed and absorbed by both structures 2 and 3. Its technical concept is very different from the conventional ladder frame type car body structure. The structures of the lower structure 2 and the upper structure 3 will be described in order below.

(lower structure)
First, the lower structure 2 will be described. The lower structure 2 includes the batteries FB, RB, the frame frame 10, the front support frame 20 and the rear support frame 30, as well as the power train PT, the front wheels FT, the rear wheels RT, and the like.

As shown in FIG. 2, the frame 10 is a member for surrounding and protecting the front battery FB, the rear battery RB, and the like. Below the passenger space side floor panel 41, which will be described later, the frame type frame 10 extends from the vicinity of the left end portion of the passenger space side floor panel 41 to the vicinity of the right end portion of the passenger space side floor panel 41, and also extends from the vicinity of the front end portion to the rear end of the passenger space side floor panel 41. It is formed large so as to extend to the vicinity of the part. Batteries FB and RB may be, for example, lithium-ion batteries, all-solid-state batteries, or other secondary batteries. Also, the batteries FB and RB may be so-called battery cells, or may be battery packs containing a plurality of battery cells.

The frame type frame 10 includes a left side member 11, a right side member 12, a front side member 13, and a rear side member 14. - 特許庁The left side member 11, the right side member 12, the front side member 13, and the rear side member 14 are made of, for example, aluminum alloy extruded materials, but they may also be made of aluminum alloy plate materials or steel plate press-formed materials. may have been In the following description, the term "extruded material" means an extruded material made of aluminum alloy, and the term "press-formed material" means a press-formed material of an aluminum alloy plate or steel plate. Also, each member may be made of, for example, casting or die casting.

When connecting the lower structure 2 to the upper structure 3, the front member 13 is fastened and fixed to the lower portion of the dash panel 50 with fastening members, and the left side member 11 and the right side member 12 are fastened to the left and right side sills 60, respectively. Fasten and fix with members. Also, the rear member 14 is fastened and fixed to a connection panel 43, which will be described later, with a fastening member. A cover member 15 is attached to the lower portion of the frame 10 . The electric power of the batteries FB and RB housed in the frame 10 is supplied to the motor M for traveling via a traveling control circuit (not shown). Furthermore, the batteries FB and RB can be charged via charging sockets (not shown).

As shown in FIG. 2 , a pair of left and right front support frames 20 are provided and connected to the front member 13 of the frame type frame 10 . The front power train PT is attached to the front support frame 20 via a mounting member (not shown).

A pair of left and right rear support frames 30 are provided in the same manner as the front support frame 20 and are connected to the rear member 14 of the frame type frame 10 . The rear power train PT is attached to the rear support frame 30 via a mount member (not shown).

(upper structure)
Next, the upper structure 3 will be described. The upper structure 3 includes a floor component 40 , a dash panel 50 , and a pair of left and right side sills 60 . The floor constituent member 40 is a member arranged above the frame form frame 10 and the rear support frame 30 of the lower structure 2 . The floor constituent member 40 includes a passenger space side floor panel 41 forming the floor of the passenger space R1 in which the front seat FS and the rear seat RS (shown in FIG. 1) on which passengers are seated, and the floor of the luggage space R3. A cargo space side floor panel 42 and a connection panel 43 connecting the rear portion of the passenger space side floor panel 41 and the front portion of the cargo space side floor panel 42 are provided.

The floor-constituting member 40 can be configured, for example, by a member obtained by pressing a steel plate or the like. The passenger space side floor panel 41, the luggage space side floor panel 42, and the connection panel 43 may be integrally formed, or may be formed separately and then connected. Further, in the present embodiment, the floor panel 41 on the passenger space side, the floor panel 42 on the cargo space side, and the connection panel 43 are divided into three parts for explanation. Also called a floor panel. Also, only the passenger space side floor panel 41 may be called a floor panel.

The passenger space side floor panel 41 extends from the front to the rear of the passenger space R1 and from the left side to the right side of the passenger space R1. The passenger space side floor panel 41 according to the present embodiment has a floor tunnel-less structure without a tunnel portion. That is, generally, a floor panel of a conventional automobile is provided with a tunnel portion that greatly bulges upward and extends in the front-rear direction. For example, this tunnel is a part for passing an exhaust pipe extending rearward from the engine mounted in the engine room at the front of the vehicle, and for passing a propeller shaft that transmits the output of the engine to the rear wheels. . Exhaust pipes and propeller shafts often have a diameter of, for example, 10 cm or more. must provide a gap of at least several centimeters. Furthermore, an insulator or the like may be arranged on the inner surface of the tunnel portion. Due to these factors, the height of the tunnel from the floor panel may be, for example, 15 cm or more or 20 cm or more. and the center of the seat cushion in the vertical direction. The tunnelless structure is such a structure that does not have a tunnel portion that protrudes greatly upward.

As described above, the passenger space side floor panel 41 does not have a tunnel portion whose height from the upper surface of the passenger space side floor panel 41 is 15 cm or more, or 20 cm or more. A low bulging portion having a height of 5 cm or less or 10 cm or less from the upper surface may be provided. In the case of such a low bulging portion, the exhaust pipe and the propeller shaft cannot be passed through it, so it does not function as a tunnel portion. Therefore, even if the floor panel 41 on the passenger space side has a low bulging portion with a height of 5 cm or less or 10 cm or less from the upper surface, the floor panel has a tunnelless structure.

In this embodiment, since the power train PT includes the traveling motor M, there is no need to mount the internal combustion engine in the front space R2, and therefore the exhaust pipe does not need to be led to the rear of the vehicle. Further, if the power train PT is mounted in the rear space R4, the power train PT can drive the rear wheels RT, and the propeller shaft can be omitted. Therefore, the passenger space side floor panel 41 can have a tunnelless structure.

As also shown in FIG. 3, the passenger space side floor panel 41 has a recessed portion 41a formed so as to bulge downward in a front-rear direction intermediate portion. The recessed portion 41a has a bottom portion 41b on which the feet of the rear seat occupant seated on the rear seat RS can be placed. The bottom portion 41b is formed substantially horizontally. The front portion of the recessed portion 41a is formed so as to gradually become deeper toward the rear side. The recessed portion 41 a can be formed continuously from the left side to the right side of the passenger space side floor panel 41 . The bottom portion 41b has substantially the same height as the lower portion of the side sill 60, which will be described later, so that the height of the bottom portion 41b can be made sufficiently low. The positional relationship between the recessed portion 41a and the seat cushion of the rear seat RS in the front-rear direction is such that when a rear seat occupant sitting in the rear seat RS puts his/her feet straight down, the feet are naturally placed on the bottom surface portion 41b. is set. The position of the front portion of the recessed portion 41a is set so that when a rear seat occupant seated in the rear seat RS moves his/her feet obliquely forward, the feet are placed on the bottom surface portion 41b. In other words, the position and longitudinal dimension of the recessed portion 41a are set so that the rear seat occupant can place his or her foot on the bottom surface portion 41b even if the foot is slightly moved back and forth. As a result, it is possible to expand the leg space of the rear seat occupants and improve the comfortability. A floor frame 41c extending in the front-rear direction is provided at the central portion in the left-right direction of the recessed portion 41a. By providing the floor frame 41c, it is possible to reinforce the portion where the recessed portion 41a is formed.

The luggage space side floor panel 42 is positioned above the passenger space side floor panel 41 . A rear space R4 is positioned below the floor panel 42 on the side of the cargo space. Since the luggage space side floor panel 42 is arranged above the passenger space side floor panel 41, the connection panel 43 extends in the vertical direction.

As also shown in FIG. 4, the dash panel 50 is a member that serves as a partition between the front space R2 and the passenger space R1, and extends upward from the front portion of the passenger space side floor panel 41 and also extends in the left-right direction. , bordering the front of the passenger space R1. FIG. 4 is a cross-sectional view taken along a plane extending in the front-rear direction through the widthwise central portion of the vehicle body.

As shown in FIGS. 2 and 3 , the left and right side sills 60 are arranged to extend in the front-rear direction at both left and right end portions of the passenger space side floor panel 41 . A left end portion of the passenger space side floor panel 41 is connected to a vertically intermediate portion of the left side sill 60 . Since the battery unit Y including the batteries FB and RB is arranged below the passenger space side floor panel 41, the lower portion of the side sill 60 and the batteries FB and RB are arranged so as to overlap when viewed from the side of the vehicle. be done. Also, the right side sill 60 is similarly connected to the right end of the passenger space side floor panel 41 .

The upper structure 3 has a pair of left and right hinge pillars 70 . Left and right front doors FD (shown in FIG. 1) are rotatably attached to the left and right hinge pillars 70, respectively. The left edge of dash panel 50 is connected to the right side surface of left hinge pillar 70 . Also, the right edge of the dash panel 50 is connected to the left side surface of the right hinge pillar 70 . Although not shown, a center pillar, a rear pillar, and the like are also provided on the upper structure 3 .

As shown in FIGS. 2 and 3, the passenger space side floor panel 41 has a front cross member 44A, an intermediate cross member 44B, a recess front cross member 44C and a recess rear cross member 44D. The front cross member 44A, the intermediate cross member 44B, the recess front cross member 44C, and the recess rear cross member 44D extend in the left-right direction and are fixed to the upper surface of the passenger space side floor panel 41. As shown in FIG.

As shown in FIG. 4 , the front cross member 44A is arranged in front of the passenger space side floor panel 41 . The front portion of the front cross member 44A is also joined to the lower portion of the dash panel 50. As shown in FIG. The intermediate cross member 44B is disposed behind the front cross member 44A and forward of the recessed portion 41a, and the intermediate cross member 44 and the passenger space side floor panel 41 form a closed cross section.

As shown in FIG. 3, the recessed front cross member 44C is disposed behind the intermediate cross member 44B so as to extend in the left-right direction along the front portion of the recessed portion 41a. The recessed portion rear cross member 44D is disposed behind the recessed portion front cross member 44C so as to extend in the left-right direction along the rear portion of the recessed portion 41a. The front portion of the floor frame 41c provided inside the recess 41a is connected to the center of the recess front cross member 44C in the left-right direction, and the rear portion of the floor frame 41c is connected to the recess rear cross member 44D. It is connected to the central portion in the left-right direction.

As shown in FIGS. 2 and 3 , the upper structure 3 includes a center frame 80 that continuously extends in the longitudinal direction from the dash panel 50 to the connection panel 43 . The center frame 80 is located in the center in the left-right direction and is arranged apart from the floor panel 41 on the passenger space side. A left front seat FS and a rear seat RS are arranged on the left side of the center frame 80 , while a right front seat FS and a rear seat RS are arranged on the right side of the center frame 80 .

By arranging the center frame 80 upwardly away from the passenger space side floor panel 41, it is possible to dispose, for example, parts between the lower surface of the center frame 80 and the upper surface of the passenger space side floor panel 41. can. Also, the space between the lower surface of the center frame 80 and the upper surface of the passenger space side floor panel 41 can be used as an article storage section. As shown in FIG. 4, the center frame 80 according to this embodiment has a bending portion 80A that bends in the vertical direction at the intermediate portion in the front-rear direction. By providing the bent portion 80A in the center frame 80, for example, the rear portion can be made lower than the front portion, so that the comfort of the rear seat occupants can be improved. In addition, since the front portion of the center frame 80 can be made higher than the rear portion, it is possible to place articles, for example, below the front portion of the center frame 80 . The bent portion 80A is formed at a portion closer to the front than the central portion of the center frame 80 in the front-rear direction.

That is, as shown in FIG. 3, the center frame 80 includes a front frame member 81 extending in the front-rear direction, a rear frame member 82 disposed behind the front frame member 81 and extending rearward, and a front frame member 82 extending rearward. It has a connection member 83 that connects the rear portion of the frame member 81 and the front portion of the rear frame member 82 . The front frame member 81 and the rear frame member 82 are hollow, that is, have a tubular shape extending in the front-rear direction, and can be made of, for example, an extruded material. By making the front frame member 81 and the rear frame member 82 hollow, they become lightweight and highly rigid members. When the center frame 80 is used as a means for blowing conditioned air, which will be described later, the rear portion of the rear frame member 82 may be closed. A rear portion of the rear frame member 82 is connected to the connection panel 43 .

The vertical cross section of the front frame member 81 and the rear frame member 82 along the vehicle width direction is rectangular. Therefore, as shown in FIG. It has an upper wall portion and a lower wall portion extending in the horizontal direction, and left and right side wall portions extending in the vertical direction. The cross-sectional shape of the front frame member 81 and the rear frame member 82 is not limited to a rectangular shape, and may be a polygon with pentagons or more, a circle, or an ellipse.

The longitudinal dimension of the rear frame member 82 is set longer than the longitudinal dimension of the front frame member 81 . Therefore, the connecting portion between the front frame member 81 and the rear frame member 82 is located forward of the central portion of the passenger space R1 in the front-rear direction. Note that the center frame 80 is not limited to a two-part structure consisting of the front frame member 81 and the rear frame member 82, and may be made up of one member from the front part to the rear part, or may have a three-part structure. There may be.

As also shown in FIG. 4, the front frame member 81 is inclined at a first inclination angle with respect to the horizontal plane and extends linearly. On the other hand, the rear frame member 82 is inclined with respect to the horizontal plane at a second inclination angle smaller than the first inclination angle and extends linearly. That is, since the rear frame member 82 is inclined at a different inclination angle than the front frame member 81, the bent portion 80A is bent downward at the connecting portion between the front frame member 81 and the rear frame member 82. is configured. In this embodiment, the rear frame member 82 is arranged so as to slope downward toward the rear side. The front frame member 81 and the rear frame member 82 may have the same inclination angle. In this case, the bent portion 80A is not formed.

As shown in FIGS. 6 and 7, inside the rear frame member 82, a first partition wall portion 82a for partitioning the internal space into an upper passage and a lower passage extends in the vehicle width direction and the front-rear direction. is provided in Further, inside the rear frame member 82, a second partition wall portion 82b for separating a left passage on the left side in the vehicle width direction and a right passage on the right side in the vehicle width direction is provided so as to extend in the vertical direction and the front-rear direction. ing. The first partition wall portion 82a and the second partition wall portion 82b are integrally formed. Four passages, that is, an upper left passage T11, an upper right passage T12, a lower left passage T13, and a lower right passage T14 are formed inside the rear frame member 82 by the first partition wall portion 82a and the second partition wall portion 82b. . The first partition wall portion 82 a and the second partition wall portion 82 b function as ribs provided inside the center frame 80 . The first partition wall portion 82a and the second partition wall portion 82b may be provided as required, and one or both of them may be omitted. Also, three or more partition walls may be provided.

Further, inside the front frame member 81, similarly to the inside of the rear frame member 82, a first partition wall portion 81a is provided so as to extend in the vehicle width direction and the front-rear direction. Thus, the internal space of the front frame member 81 is partitioned into an upper passage and a lower passage. A second partition wall portion 81 b is also provided inside the front frame member 81 to separate the left passage on the left side in the vehicle width direction from the right passage on the right side in the vehicle width direction. The first partition wall portion 81a and the second partition wall portion 81b define an upper left passage T11, an upper right passage T12, a lower left passage T13, and a lower right passage T14 inside the front frame member 81, similarly to the rear frame member 82. It is formed.

As shown in FIGS. 8 to 10, the connection member 83 has a tubular shape that connects the rear portion of the front frame member 81 and the front portion of the rear frame member 82 so as to communicate with each other. The rear portion and the front portion of the rear frame member 82 are connected while being inserted into the connection member 83 . Specifically, the connection member 83 has an upper wall portion 83a and a lower wall portion 83b extending in the horizontal direction, and a left wall portion 8c and a right wall portion 83d extending in the vertical direction. The upper wall portion 83a extends from the upper portion of the left wall portion 8c to the upper portion of the right wall portion 83d, and the lower wall portion 83b extends from the lower portion of the left wall portion 8c to the lower portion of the right wall portion 83d. The front-rear dimension of the lower wall portion 83b of the connection member 83 is set longer than the front-rear dimension of the upper wall portion 83a. The lengths of the left wall portion 8c and the right wall portion 83d in the front-rear direction are longer toward the lower side so as to correspond to the difference in the front-rear direction size of the upper wall portion 83a and the lower wall portion 83b.

Inside the connecting member 83, there are a first connecting wall portion 83e extending in the horizontal direction from the vertical intermediate portion of the left wall portion 8c to the vertical intermediate portion of the right wall portion 83d, and A second connecting wall portion 83f extending to the middle portion in the left-right direction of the lower wall portion 83b is provided. The first connecting wall portion 83e and the second connecting wall portion 83f are formed integrally with the upper wall portion 83a, the lower wall portion 83b, the left wall portion 8c and the right wall portion 83d.

A front notch 83g into which the rear part of the front frame member 81 is inserted is formed on the front side of the second connecting wall 83f. A rear notch 83h into which the front part of the rear frame member 82 is inserted is formed on the rear side of the second connecting wall 83f. When the front frame member 81 and the rear frame member 82 are connected by the connecting member 83, the upper left passage T11, the upper right passage T12, the lower left passage T13, and the lower right passage T14 of the front frame member 81 are connected to the rear frame member, respectively. 82 communicates with the upper left passage T11, the upper right passage T12, the lower left passage T13 and the lower right passage T14.

In addition, as shown in FIG. 5, the center frame 80 has a left frame component 84A and a right frame component 84B that constitute the front portion of the center frame 80, thereby forming a shape branched in the left and right direction. It has become. The left frame component 84A and the right frame component 84B are spaced apart from each other in the left-right direction. The rear portion of the left frame component member 84A is fixed to the left side surface of the front-rear direction intermediate portion of the front frame member 81 . The left frame component member 84A is inclined in a plan view so as to be positioned to the left as it goes forward from the portion fixed to the front frame member 81 toward the front side. A front portion of the left frame component member 84A is connected to a portion of the dash panel 50 which is spaced upward from the passenger space side floor panel 41 .

Also, the rear portion of the right frame component 84B is fixed to the right side surface of the front frame member 81 at the middle portion in the front-rear direction. The right frame component member 84B is inclined in a plan view so as to be positioned to the right as it goes forward from the portion fixed to the front frame member 81 toward the front side. A front portion of the right frame component member 84B is connected to a portion of the dash panel 50 which is spaced upward from the passenger space side floor panel 41 .

As shown in FIG. 3, the upper structure 3 includes first to third connecting members 101-103. The first to third connecting members 101 to 103 are members that extend upward from the passenger space side floor panel 41, have their upper portions fixed to the center frame 80, and connect the center frame 80 to the passenger space side floor panel 41. . The first connecting member 101 is disposed foremost in the passenger space R1, and the first connecting member 101 is separated from the dash panel 50 rearward. The lower portion of the first connecting member 101 is fixed to a portion of the passenger space side floor panel 41 rearwardly away from the dash panel 50, and the upper portion of the first connecting member 101 is rearwardly separated from the dash panel 50 of the center frame 80. fixed to the part. In addition, the second connecting member 102 is arranged rearward away from the first connecting member 101 . A lower portion of the second connecting member 102 is connected to the intermediate cross member 44B. Also, the third connecting member 103 is arranged rearwardly away from the second connecting member 102 . A lower portion of the third connecting member 103 is connected to the recess front cross member 44C.

As shown in FIG. 5, the first connecting member 101 has a left member (left connecting member) 101A and a right member (right connecting member) 101B. The lower portions of the left member 101A and right member 101B are fixed to the front cross member 44A. The left member 101A extends upward from the front cross member 44A so as to be positioned leftward as viewed from the front. The upper portion of the left member 101A is fixed to the front portion of the left frame component member 84A of the center frame 80. As shown in FIG. Further, the right member 101B extends upward from the front cross member 44A so as to be positioned rightward as viewed from the front. The upper portion of the right member 101b is fixed to the front portion of the right frame component member 84B of the center frame 80. As shown in FIG. Since the front portion of the left frame component 84A and the front portion of the right frame component 84B are separated in the left-right direction, most of the left member 101A and the right member 101B except for the lower portion are separated in the left-right direction. , and the horizontal interval between the left member 101A and the right member 101B increases upward.

As shown in FIG. 4, the upper structure 3 includes an air conditioner 120 that generates conditioned air to be blown into the passenger space R1. The air conditioner 120 is arranged forward of the front portion of the front frame member 81 and positioned forward of the center frame 80 .

The air conditioner 120 has a cooler (heat exchanger) 121 through which air for air conditioning passes, an air conditioning casing 122 that houses the cooler 121 , and an air distribution section 123 . The cooler 121 is a cooling heat exchanger composed of an evaporator or the like for cooling the conditioned air, but is not limited to this, and may be a heating heat exchanger composed of a heater core, a condenser, or the like that heats the conditioned air. good too. The cooler 121 of this embodiment is arranged forward of the dash panel 50 .

Inside the air-conditioning casing 122 of the air-conditioning device 120, in addition to the cooler 121, there is a heater (not shown) and a desired mixture ratio of cold air passing through the cooler 121 and warm air passing through the heater. An air mix damper 122a for generating temperature conditioned air is accommodated. A portion of the air-conditioning casing 122 that accommodates the cooler 121 and the air mix damper 122 a is arranged forward of the dash panel 50 .

As also shown in FIG. 11 , the wind distribution section 123 is a section that distributes air-conditioned air generated in the air-conditioning casing 122 to various parts of the passenger space R1, and is provided above and behind the air-conditioning casing 122 . Specifically, the wind direction portion 123 is positioned rearward of the dash panel 50, that is, above the front portion of the center frame 80 in the center portion in the vehicle width direction of the passenger space R1.

As shown in FIG. 4, inside the wind distribution portion 123, a plurality of blowout direction switching dampers 123b are provided. By operating the blowout direction switching damper 123b, the conditioned air can be supplied to the inner surface of the front windshield FG (shown in FIG. 1), to the upper body of the passenger, or to the vicinity of the passenger's feet. The operation of the blowout direction switching damper 123b is conventionally known. Inside the wind distribution portion 123, a blowout direction switching damper 123b for the rear seat is also provided.

The air distribution portion 123 has a blowout portion 123c having a duct shape from which air-conditioned air generated inside the air-conditioning casing 122 blows out. The air conditioner 120 also has an air guide duct 120d that allows communication between the inside of the air distribution portion 123 and the inside of the center frame 80, and introduces the conditioned air blown out from the blowout portion 123c of the air distribution portion 123 into the center frame 80. are doing. The air guide duct 120d is arranged between the left frame component 84A and the right frame component 84B above the control device 130, which will be described later, and extends in the front-rear direction. A front portion of the air guide duct 120 d is connected to the blowout portion 123 c, while a rear portion of the air guide duct 120 d is connected to a front portion of the front frame member 81 of the center frame 80 . Thereby, the conditioned air generated by the air conditioner 120 is introduced into the center frame 80 via the air guide duct 120d. The air guide duct 120 d may be a member forming part of the center frame 80 .

Since the center frame 80 extends in the front-rear direction, the conditioned air can be guided to desired locations in the passenger space R1 in the front-rear direction. In this case, since the air guide duct 120d is arranged above the control device 130 and has a predetermined width in the left-right direction, the direct sunlight is also blocked by the air guide duct 120d and reaches more of the control device 130. it gets harder. Further, by using the center frame 80 as an air conditioning duct, there is no need to provide a separate air conditioning duct, and the passenger space R1 can be made wider than when an air conditioning duct is provided separately.

As shown in FIG. 3, an upper air blower 80b for upwardly blowing the conditioned air in the upper left passage T11 and the upper right passage T12 is provided in a portion of the upper wall portion of the center frame 80 that is spaced rearward from the air guide duct 120d. is provided. The upper blower sections 80b are located on the upper wall section of the center frame 80 behind the backrest section of the front seat FS, and are provided on both left and right sides. The left upper air blower (left air blower) 80b has a tubular shape communicating with the upper left passage T11, and the right upper air blower (right air blower) 80b has a tubular shape communicating with the upper right passage T12. there is The downstream end of the upper air blowing portion 80b is open upward to face the passenger seated on the rear seat RS.

A lower air blower 80c for downwardly blowing the conditioned air in the lower left passage T13 and the lower right passage T14 is provided at a portion of the lower wall portion of the center frame 80 that is away from the air guide duct 120d. . The lower blower section 80c is located behind the seat cushion section of the front seat FS, and is provided on both left and right sides of the lower wall section of the center frame 80, respectively. The left lower blower portion 80c has a tubular shape communicating with the lower left passage T13, and the right lower blower portion 80c has a tubular shape communicating with the lower right passage T14. The lower air blowing portion 80c is composed of a rear heat duct that extends downward toward the recessed portion 41a, extends downward from the center frame 80, and then bends outward in the vehicle width direction. One of the upper air blowing section 80b and the lower air blowing section 80c may be omitted.

In addition, since the center frame 80 has a large cross-section that can improve the torsional rigidity of the vehicle body, even if the amount of air-conditioning air circulating inside is increased, the blowing noise can be kept low. In particular, since the center frame 80 extends in a shape close to a straight line, the internal passages also have a shape close to a straight line, which also makes it possible to suppress the blowing noise to a low level. Furthermore, when the center frame 80 is not provided with a heat insulating material or the like, the heat of the air-conditioned air flowing inside the center frame 80 is transmitted to the wall portion of the center frame 80, and the occupant space is displaced from the outer surface of the wall portion. Radiated to R1. This enables comfortable air conditioning using radiant heat. Note that the center frame 80 may be provided with a heat insulating material.

The air conditioner 120 has foot ducts 124A and 124B for guiding downward the conditioned air blown from the air distribution section 123 . The leg ducts 124A, 124B mainly include a left front leg duct 124A and a right front leg duct 124B for supplying warm air to the vicinity of the feet of the passenger sitting on the front seat FS. The upstream end (upper end) of the left front foot duct 124A is located above the left frame component 84A, is attached to the left side wall of the air distribution section 123, and communicates with the inside of the air distribution section 123. The left front foot duct 124A extends from its upstream end to the left above the left frame component 84A of the center frame 80, and then extends downward along the left side surface of the left frame component 84A. The downstream end of the left front leg duct 124A opens downward. That is, the left front leg duct 124A extends downward from above the left frame component 84A through the vehicle width direction outside of the left frame component 84A.

The upstream end (upper end) of the right front leg duct 124B is located above the right frame component 84B, is attached to the right side wall of the air distribution section 123, and communicates with the inside of the air distribution section 123. there is The right front foot duct 124B extends from its upstream end to the right above the right frame component 84B of the center frame 80, and then extends downward along the right side surface of the right frame component 84B. The downstream end of the right front foot duct 124B opens downward. That is, the right front leg duct 124B extends downward from above the right frame component 84B through the vehicle width direction outside of the right frame component 84B.

The air distribution portion 123 is arranged above the left frame component 84A and the right frame component 84B, and the left front leg duct 124A and the right front leg duct 124B are installed sideways from above the left frame component 84A and the right frame component 84B. A space can be created below the center frame 80 because it is arranged so as to extend in the direction. By arranging articles and the like in the space below the center frame 80, the space can be effectively utilized. In this embodiment, as shown in FIGS. 4 and 11, the control device 130 is arranged below the front side of the center frame 80 .

Also, the left front foot duct 124A and the right front foot duct 124B are spaced apart in the left-right direction. Between the left front foot duct 124A and the right front foot duct 124B, an air guide duct 120d extending in the longitudinal direction is arranged. The space between the duct 124B can be effectively used.

The left front foot duct 124A and the right front foot duct 124B have cross sections perpendicular to the air circulation direction, and the length in the front-rear direction is set longer than the width in the vehicle width direction. As a result, the foot ducts 124A and 124B have a flat cross section that is elongated in the front-rear direction. You can secure a lot. Note that the foot ducts 124A and 124B may extend to the vicinity of the passenger space side floor panel 41 . Also, one of the foot ducts 124A and 124B may be omitted.

(Layout of control device)
The vehicle body structure A includes a control device 130 (shown in FIGS. 4 and 11) that controls controlled parts mounted on the automobile 1 . Controlled units include, for example, a power train PT, a brake device, an electronically controlled suspension device, a lighting device, a navigation device, a head-up display device, an audio device, an in-vehicle monitor, and a television. Since the control device 130 that controls these controlled units includes a high-performance CPU, memory, etc., it is large and vulnerable to high heat and impact. The control device 130 is also provided with a water jacket or the like through which cooling water flows as a countermeasure against heat generation. In addition, in-vehicle entertainment functions (video playback function, music playback function) and the like may be installed, and in this case also, the control device 130 becomes large.

The control device 130 of this embodiment is arranged below the front portion of the center frame 80 in the passenger space R1. As indicated by the phantom line in FIG. 4, above the front portion of the center frame 80, an instrument panel IP to which instruments are attached is arranged. The instrument panel IP extends in the left-right direction from the left side to the right side of the passenger space R1. Further, the front portion of the instrument panel IP reaches the lower portion of the front windshield FG (shown in FIG. 1).

Since the control device 130 is arranged below the center frame 80 in the passenger space R1, for example, the direct sunlight from the outside is blocked by the center frame 80 and does not reach the control device 130 easily. Therefore, the controller 130 can be placed in a thermally advantageous location. In addition, since the instrument panel IP is arranged above the control device 130 , direct sunlight is also blocked by the instrument panel IP, making it even more difficult for the direct sunlight to reach the control device 130 . Moreover, since the control device 130 is covered with the instrument panel IP, it becomes difficult to see from the outside, which is preferable in terms of security.

Further, an air guide duct 120d is arranged above the control device 130. As shown in FIG. The heat of the air-conditioning air is transferred to the wall of the air guide duct 120d and radiated from the outer surface of the wall toward the control device 130 as radiant heat. At this time, air-conditioned air whose temperature is adjusted so as to make the passenger space R1 comfortable flows through the air guide duct 120d. acts on Direct sunlight can also be blocked by the air guide duct 120d.

(cooling path)
Next, the cooling path will be explained. FIG. 13 is a diagram showing a schematic structure of cooling paths provided in the automobile 1. As shown in FIG. The cooler 121 is composed of a heat exchanger for cooling the air conditioner 120 . The cooler 121 is formed with a passage for cooling water as a heat exchange medium, and the cooling water flowing through this passage is cooled by exchanging heat with the low-temperature refrigerant inside the cooler 121 . The vehicle body structure A includes a supply pipe 131 for supplying cooling water cooled by the cooler 121 to a water jacket (not shown) of the control device 130, and a supply pipe 131 for discharging the cooling water supplied to the control device 130. , and a discharge pipe 132 . The supply pipe 131 is provided with a pump P for sending cooling water to the control device 130 . The cooling water discharged from the discharge pipe 132 is sucked into the pump P after being cooled by passing through the cooler 121 . Control device 130 is cooled by circulating the cooling water in this manner. A refrigerant may be used instead of the cooling water.

As shown in FIG. 4 , the cooler 121 is arranged behind the front powertrain PT and close to the dash panel 50 . This allows the cooler 121 to be closer to the controller 130 than the front powertrain PT. Therefore, the length of the supply pipe 131 can be shortened, and the pipe route can be simplified. Since the loss of cold heat between them is reduced, the control device 130 can be efficiently cooled.

(Action and effect of the embodiment)
As described above, according to this embodiment, by providing the center frame 80 which is separated upward from the passenger space side floor panel 41 in the passenger space R1, a reinforcing effect of the vehicle body can be obtained. can increase Moreover, since the air distribution section 123 of the air conditioner 120 is positioned above the center frame 80 , the air distribution section 123 does not have to be arranged in the space below the center frame 80 . Furthermore, since the foot ducts 124A and 124B connected to the air distribution portion 123 extend downward through the outside of the center frame 80 in the vehicle width direction, the foot ducts 124A and 124B are provided in the space below the center frame 80. 124A and 124B can be omitted. Therefore, various parts, devices, etc. can be arranged in the space below the center frame 80, and the degree of layout freedom is improved.

In addition, since the left foot duct 124A and the right foot duct 124B are provided on both the left and right sides of the air distribution portion 123, respectively, the left foot duct 124A and the right foot duct 124B provide conditioned air to the left and right sides of the passenger space R1. can be blown, and the comfort of the occupant can be improved.

Furthermore, the conditioned air generated by the air conditioner 120 is introduced into the inside of the center frame 80 via the air guide duct 120d, and then blown out from the blowers 80b and 80c. Since the center frame 80 extends in the front-rear direction, the conditioned air can be guided to desired locations in the passenger space R1 in the front-rear direction. In this case, since the air guide duct 120d is arranged between the left frame component 84A and the right frame component 84B, the air guide duct 120d does not have to be arranged in the space below the center frame 80. The layout flexibility of the space below the center frame 80 is not deteriorated.

The above-described embodiments are merely examples in all respects and should not be construed in a restrictive manner. Furthermore, all modifications and changes within the equivalent range of claims are within the scope of the present invention.

As described above, the vehicle body structure according to the present invention can be used, for example, in electric vehicles and other automobiles.

1 Automobile 41 Passenger space side floor panel 80 Center frame 80b Upper air blower 80c Lower air blower 84A Left frame constituent member 84B Right frame constituent member 120 Air conditioner 120d Air duct 123 Wind distribution portion 124A Left front foot duct (for left foot duct)
124B right front foot duct (right foot duct)
130 control device A vehicle body structure

Claims (5)

In the car body structure,
a floor panel that constitutes the floor of the occupant space provided with a seat on which the occupant sits;
a center frame disposed upwardly away from the floor panel in a central portion of the passenger space in the vehicle width direction and extending in the vehicle front-rear direction;
an air conditioner for blowing conditioned air to the passenger space,
The air conditioner includes an air distribution section that is positioned above the front portion of the center frame and distributes the generated conditioned air to each part of the passenger space, and guides downward the conditioned air that is blown from the air distribution section. and a foot duct,
The foot duct extends downward from above the center frame through the outside of the center frame in the vehicle width direction. In the vehicle body structure according to claim 1,
The front part of the center frame is composed of a left frame component and a right frame component which are spaced apart from each other in the vehicle width direction,
The foot duct includes a left foot duct extending downward from above the left frame component and passing through the left frame component outside in the vehicle width direction, and a left foot duct extending downward from above the right frame component. A vehicle body structure including a right foot duct extending downward through the vehicle width direction outer side of the component member. In the vehicle body structure according to claim 2,
The center frame has a hollow shape,
An air guide duct that communicates the air distribution portion of the air conditioner with the inside of the center frame and introduces conditioned air blown from the air distribution portion into the center frame, is provided between the left frame component and the right frame. disposed between the constituent members,
A vehicle body structure in which an air blower for blowing conditioned air in the center frame is provided at a portion of the center frame that is spaced rearward of the vehicle from a connection portion with the air guide duct. In the vehicle body structure according to any one of claims 1 to 3,
A vehicle body structure in which a control device for controlling a controlled part mounted on the vehicle is disposed below the center frame. In the vehicle body structure according to any one of claims 1 to 4,
A vehicle body structure in which a cross section perpendicular to an air circulation direction of the foot duct has a dimension in the vehicle front-rear direction set longer than a dimension in the vehicle width direction.

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